In-line skate base



FIG. 1 is a perspective view of a in-line skate base;

FIG. 2 is a top plain view thereof;

FIG. 3 is a left side plain view thereof;

FIG. 4 is a front plain view thereof;

FIG. 5 is a rear plain view thereof;

FIG. 6 is a bottom plain view thereof; and,

FIG. 7 is a right side plain view thereof. 

The Ornamental Design for a in-line skate base, as substantially shown and described. 